From 4db4d42ee290a8cad00b358b2e7ef6a00483893b Mon Sep 17 00:00:00 2001
From: Lukasz Majewski <l.majewski@majess.pl>
Date: Mon, 28 Nov 2016 07:18:14 +0100
Subject: [PATCH] imx6: clock: Enable External Memory Interface [EIM] clock
(eim_slow_clock)
This patch extends the imx6 clock code to enable or disable the EIM
slow clock, which in necessary when one wants to use EIM interface t
o read/write from external memory (e.g. NOR).
Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
---
arch/arm/cpu/armv7/mx6/clock.c | 14 ++++++++++++++
arch/arm/include/asm/arch-mx6/clock.h | 1 +
2 files changed, 15 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 96fbd81d08..299562884a 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -1384,6 +1384,20 @@ void select_ldb_di_clock_source(enum ldb_di_clock clk)
}
#endif
+#ifndef CONFIG_SYS_NO_FLASH
+void enable_eim_clk(unsigned char enable)
+{
+ u32 reg;
+
+ reg = __raw_readl(&imx_ccm->CCGR6);
+ if (enable)
+ reg |= MXC_CCM_CCGR6_EMI_SLOW_MASK;
+ else
+ reg &= ~MXC_CCM_CCGR6_EMI_SLOW_MASK;
+ __raw_writel(reg, &imx_ccm->CCGR6);
+}
+#endif
+
/***************************************************/
U_BOOT_CMD(
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 82f9f92b83..ed1433ebc6 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -79,4 +79,5 @@ void enable_qspi_clk(int qspi_num);
void enable_thermal_clk(void);
void mxs_set_lcdclk(u32 base_addr, u32 freq);
void select_ldb_di_clock_source(enum ldb_di_clock clk);
+void enable_eim_clk(unsigned char enable);
#endif /* __ASM_ARCH_CLOCK_H */
--
2.39.5